Identify quality from appearance sound
Put the tile line at a certain distance for visual inspection. If it is basically uniform, meet the standard specifications and tolerances. If there is obvious unevenness, it indicates that the quality of the tile has certain problems and should not be purchased. In addition, judging from the sound, tapping on the surface of the tile with an iron bar, if the sound is clear, it is the top grade, and if the sound is muddy and dull, it is a defective product.
Shop stickers with a firm degree
Hold the two corners together on both sides with both hands, and then set them upright. Then lay them flat and repeat several times to pass the bricks as qualified or take the tiles.
Dehydration time test method
Put the tiles flat, spread the stickers upward, soaked in water after 40 minutes, pinch the corner of the shop stickers, remove the paper, can be peeled off that is consistent with the standard, as a qualified product, and vice versa.
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Building materials tricky tile tile specifications
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